- City Departments
- Public Works
- Water & Sewer
- Wastewater Treatment Plant
Wastewater Treatment Plant
The Wastewater Treatment Plant consists of two pre-aeration cells, three aerated lagoons, and two polishing ponds with secondary treatment through utilization of slow sand filtration prior to final discharge into the Green River.
The City of Green River residents
Bar Screen Machine: Raw sewage flows through screens that remove most objects larger than ¾ of an inch.
Grit Basins: Sewage flows through a 20-foot deep tank. This allows sand, grit, and other heavy particles to settle to the bottom. Later, they are removed.
Aeration Cells and Lagoons: Supplies large amounts of air to mix the wastewater and bacteria. The air speeds the growth of helpful microorganisms which already exist in the wastewater to consume harmful organic matter in the wastewater. It is the job of microorganisms to "eat" the waste materials contained in the wastewater. Some microorganisms which may be involved in a treatment system are bacteria, protozoa, and algae. Microorganisms are the
Laboratory: Several analyses must be conducted to monitor the contents of the wastewater and to make sure that treatment methods are working correctly. The results must meet federal and state standards. Monthly we must send all the results to the Department of Environmental Quality and the Environmental Protection Agency.